Onii-chan Is Done For!

Mahiro Oyama was an ordinary guy who loved playing adult games—until he woke up one morning as a girl. His genius little sister, Mihari, had used him as a test subject for one of her experiments, and now he’s stuck in this new body. While Mahiro just wants to go back to his lazy, gaming-filled life, Mihari is determined to study him closely. One thing’s certain: things are about to get a lot more chaotic from here on out!